login.java

一个用java编写的网络聊天软件 里边含有设计报告和源代码等可用的文件！！ 开发环境是eclips

package chat1;

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;


public class Login extends JFrame implements ActionListener{

    /**
	 * 
	 */
	private static final long serialVersionUID = -1032166884261196679L;
	private TextField text1;
    private TextField text2;
    private Label lb1;
    private Label lb2;
    private Button bt1;
    private Button bt2;
    
    
    public Login(){
    	this.setLayout(null);
    	this.setTitle("Welcome to login!");
    	this.setBounds(400, 200, 300, 220);
    	lb1 = new Label("请输入帐号：");
    	lb1.setBounds(20, 40, 70, 25);
    	this.add(lb1);
    	
    	
    	lb2 = new Label("请输入密码：");
    	lb2.setBounds(20, 80, 70,25);
    	this.add(lb2);
    	
    	text1 = new TextField("中文或英文");
    	text1.setBackground(Color.orange);
    	text1.setBounds(120, 40,100, 25);
    	text1.addActionListener(new myActionLisener());
    	this.add(text1);
    	
    	text2 = new TextField(4);
    	text2.setBackground(Color.orange);
    	text2.setBounds(120, 80, 100, 25);
    	text2.setEchoChar('*');
    	text2.addActionListener(new myActionLisener());
    	text2.addTextListener(new myTextListener());
    	this.add(text2);
    	
    	bt1 = new Button("确定");
    	bt1.setBounds(40,120,70,25);
    	bt1.addActionListener(this);
    	this.add(bt1);
    	
    	
    	bt2 = new Button("取消");
    	bt2.setBounds(140,120,70,25);
    	bt2.addActionListener(null);
    	this.add(bt2);
    	
    
    	
     
    	this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    	this.setBackground(Color.yellow);
    	this.setVisible(true);
    }
    
    class myActionLisener implements ActionListener{
    	
    	public void actionPerformed(ActionEvent e){
    		
    		
    		if(e.getSource()==text1){
    			
    			if(text1.getText().trim().length()>0)
    				text1.transferFocus();
    		}
    		if(e.getSource()==text2){
    			JOptionPane.showMessageDialog(null,"密码正确,准备登录");
    			//text2.setText("");
    		}
    		if(e.getSource()==bt2){
    			System.exit(0);
    		}
    	}
    	
    	
    }
    
    class myTextListener implements TextListener{
    	
    	public void Textvaluechanged(TextEvent e){
    		
    	 if(text2.getText().equals(""));
    	 {  JOptionPane.showMessageDialog(null,"密码有误，重新输入");
    	   
    	 
    	    System.exit(0);
    		 
    	 }
    	}

		public void textValueChanged(TextEvent arg0) {
			// TODO 自动生成方法存根
			
		}
    	   	
    	
    }
    
    
	
	
	/**
	 * @param args
	 */
	public static void main(String[] args) {
	
	   new Login();
	}




	public void actionPerformed(ActionEvent evt) {
		
		if(evt.getSource()== bt1){
			
		    new Chat_client();
			
		}
		
		
		
		
		// TODO 自动生成方法存根
		
	}

}